I am forced to admit I will never have time to develop these domains.
I registered my first domain in 1998. I used to watch expired domain lists and whenever one I thought would be fun to develop I would register it.
Of course, registration is the simple part. Life goes on, and now, at 79, it’s obvious I will not have time or energy to do anything with many of the domains in my portfolio.
If this sounds interesting, bookmark the site and check back occasionally as I will list a variety of aged, short dot com domains.